<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="utf-8">
    <title>state 的简写方式</title>
</head>

<body>
    <div id="test"></div>
    <script type="text/javascript" src="../js/react.development.js"></script>
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <script type="text/javascript" src="../js/babel.min.js"></script>
    <script type="text/babel">
        //1 创建类式组件
        class Weather extends React.Component {
            //初始化状态
            state = { isHot: true, wind: "微风" }
            render() {
                const { isHot, wind } = this.state
                return <h2 onClick={this.changeWeather}>今天天气很{isHot ? '炎热' : '凉爽'},{wind}</h2>
            }
            //自定义方法--要用赋值语句的形式+箭头函数
            //箭头函数 没有this则向上层找this
            changeWeather = () => {
                console.log(this)
                const isHot = this.state.isHot
                this.setState({ isHot: !isHot })
            }
        }
        //2 渲染组件到页面
        ReactDOM.render(<Weather />, document.getElementById('test'))
    </script>
</body>

</html>